chmod - no reaction

hey there
i am really new to this forum
just installed debian and added my ipod to fstab. mounting works good and well, but I can't change the permissions of /mnt/ipod! even if i type "chmod ugo+rwx /mnt/ipod" in the root console, the command has no effect - the permissions stay the same. chown doesn't work either - output is "not permitted"...
any ideas?

(if this post already appeared I'm sorry - I didn't find anything as I searched around)
thx for eventual help!

hey
i figured it out
to be logged on as normal user and execute a console with root rights doesn't give you that much permissions as to be logged on as root!
i re-logged in as root and tried again - successful.
thx falco for the quick reply

dante

***edit***
this thing is driving me crazy - I can change mode as long as I want but as soon as I plug the ipod in, the permissions are changed back to the old ones! and when the ipod is plugged in, I can't change anything anyway! any ideas? (besides, I can't change permissions for hdd partitions too)